jQuery Speed Test: $(this) vs .get() vs .eq()

Each loop cache performance – test to see if grabbing the current element from inside the each is possible/faster from a cached array of elements. Namely $(this) vs .get() vs .eq() with .text() and textContent/innerText. Tests run with jQuery 1.9.1. Similar to: jQuery Speed Test: $(this).attr(“id”); vs this.id .

• .get() and .eq() both return a single “element” from a jQuery object array, but they return the single element in different forms.
• .eq() returns it as a jQuery object, meaning the DOM element is wrapped in the jQuery wrapper, which means that it accepts jQuery functions.
• .get() return a raw DOM element. You may manipulate it by accessing its attributes and invoking its functions as you would on a raw DOM element. But it loses its identity as a jQuery-wrapped object, so a jQuery function like .fadeIn won’t work.

Setup

   

       
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nested 1
             
nested 2
             
nested 3
         
       
       
list
         

             
nested 1
             
nested 2
             
nested 3
         
       
list
         

             
nested 1
             
nested 2
             
nested 3
         
       
list
   
   

Tests

$.each(MY_OBJECT.cache.n, function(i, v) 
{
    MY_OBJECT.cache.s.text($(this).text());
});


$.each(MY_OBJECT.cache.n, function(i, v) 
{
    MY_OBJECT.cache.s.text(MY_OBJECT.cache.n.eq(i).text());
});


$.each(MY_OBJECT.cache.n, function(i, v) 
{
    MY_OBJECT.cache.s.text(MY_OBJECT.cache.n.get(i).textContent);
});

Meet the author

Sam Deering

Sam Deering is a Front-end Web Developer who specialises in JavaScript & jQuery. Sam is driven and passionate about sharing his knowledge to educate others.